<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.7.14/vue.min.js"></script>
</head>
<body>
    <div id="root">
        <h2>人员列表</h2>
        <input type="text" placeholder="请输入名字" v-model="keyword">
        <button @click="sortType=2">年龄升序</button>
        <button @click="sortType=1">年龄降序</button>
        <button @click="sortType=0">原序</button>
        <ul>
            <li v-for="(p,index) in filPersons" :key="index">
                {{p.name}}-{{p.age}}-{{p.sex}}
            </li>
        </ul> 
    </div>
    <script>
        Vue.config.productionTip = false;
    
        new Vue({
            el:"#root",
            data:{
                keyword:"",
                sortType:0,//0是原序，1是降序，2是升序
                persons:[
                    {id:"001",name:"周冬雨",age:18,sex:"女"},
                    {id:"002",name:"马冬梅",age:30,sex:"女"},
                    {id:"003",name:"周杰伦",age:38,sex:"男"},
                    {id:"004",name:"温兆伦",age:40,sex:"男"}
                ]
            },
            computed:{
                filPersons(){
                        const arr=this.persons.filter((p)=>{
                            return p.name.indexOf(this.keyword) !==-1;
                        });
                        // 判断一下是否需要排序
                        if(this.sortType!==0){
                            arr.sort((p1,p2)=>{
                                return this.sortType===1 ?p2.age-p1.age:p1.age-p2.age;
                            })
                        }
                        return arr;
                    }
            }
        });

        // 排序小例子
        let arr=[32,1,6,5,33,22,90];
        arr.sort((a,b)=>{
            return a-b;//升序
            // return b-a;//降序
        })
        console.log(arr);
        </script>
    </body>
</html>